F.A.Q.    Register    Login    Home Members    Search

Toymods » Tech & Conversions » Capacity vs Cylinders Show: Today's Posts  :: Show Polls  Email to friend

Author	Topic
oldcorollas Forums Junkie Location: Kita-Ku, Sapporo, Japan Registered: January 2003	Re: Capacity vs Cylinders Wed, 18 June 2003 05:38 fingers wrote on Wed, 18 June 2003 09:14 I would have thought that having six cylinders compared to four for a given size would make it smoother as you have two extra pistons firing. Is that a valid comment? definitely, and is what everyone is forgetting. the power output of a motor is not constant, but is a pulsing curve with one pulse for each piston firing. take an extreme example. a 3L 4 cyl, compared to a 3L V10 the 4cyl will have two power pulses per revolution, and the V10 will have 5 pulses. so the V10 will have much smoother power delivery, and i think that the average torque (area under the curve of torque vs time) will be higher for the V10. an analogy is single phase vs 3 phase electricity. liek comparing single cylinder vs 3 cylinder. (unfortunately it's like comparing different size engines tho) if you look at a graph of the three suprimposed voltage curves for 3 phase, the average voltage is higher.. 415V vs 240V, and you have 3 times the amperage available... i'm sure an elec engineer will be able to do the math as i'm a bit rusty, but i think that for a 3 phase circuit with same amperage going thru it, it will have higher power than a single phase with same amperage. yes the mechanical losses will be higher, but not by much.. a direct example from the bike world for 1L motors(assuming similar development) a YZF-R1 (4cyl) has about 105Nm, where a VTR-SP1 has about 100Nm, so 5% less for same capacity. they have vry diferent torque curves too, with the R1 having torque higher in the rev range, and the SP1 having a wider and flatter, but lower rpm, torque curve..... Cya, Stewart [Report message to a moderator]

	Subject	Poster	Date
	Capacity vs Cylinders	justcallmefrank	Sun, 15 June 2003 10:24
	Re: Capacity vs Cylinders	lang	Sun, 15 June 2003 10:29
	Re: Capacity vs Cylinders	justcallmefrank	Sun, 15 June 2003 10:30
	Re: Capacity vs Cylinders	V8_MA61	Sun, 15 June 2003 10:35
	Re: Capacity vs Cylinders	manipulate	Sun, 15 June 2003 11:10
	Re: Capacity vs Cylinders	V8_MA61	Sun, 15 June 2003 11:26
	Re: Capacity vs Cylinders	BansheeBuzz	Sun, 15 June 2003 11:35
	Re: Capacity vs Cylinders	V8_MA61	Sun, 15 June 2003 11:43
	Re: Capacity vs Cylinders	mrshin	Sun, 15 June 2003 11:29
	Re: Capacity vs Cylinders	mrshin	Sun, 15 June 2003 11:45
	Re: Capacity vs Cylinders	justcallmefrank	Sun, 15 June 2003 11:48
	Re: Capacity vs Cylinders	V8_MA61	Sun, 15 June 2003 11:52
	Re: Capacity vs Cylinders	justcallmefrank	Sun, 15 June 2003 11:54
	Re: Capacity vs Cylinders	V8_MA61	Sun, 15 June 2003 11:55
	Re: Capacity vs Cylinders	fingers	Tue, 17 June 2003 23:14
	Re: Capacity vs Cylinders	Nark	Wed, 18 June 2003 04:07
	Re: Capacity vs Cylinders	oldcorollas	Wed, 18 June 2003 05:38
	Re: Capacity vs Cylinders	thetoyman75	Wed, 18 June 2003 04:33
	Re: Capacity vs Cylinders	gianttomato	Wed, 18 June 2003 04:36
	Re: Capacity vs Cylinders	justcallmefrank	Wed, 18 June 2003 04:37
	Re: Capacity vs Cylinders	Purple_Beasty	Wed, 18 June 2003 05:09
	Re: Capacity vs Cylinders	justcallmefrank	Wed, 18 June 2003 05:16
	Re: Capacity vs Cylinders	1ndecent	Wed, 18 June 2003 05:51

Previous Topic:	fuel tanks
Next Topic:	Fuel problem

Powered by: FUDforum 2.3.8
Copyright ©2001-2003 Advanced Internet Designs Inc.